EP4098392A1 - Procédé de soudage de plaque de couvercle de batterie - Google Patents

Procédé de soudage de plaque de couvercle de batterie Download PDF

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Publication number
EP4098392A1
EP4098392A1 EP21190239.0A EP21190239A EP4098392A1 EP 4098392 A1 EP4098392 A1 EP 4098392A1 EP 21190239 A EP21190239 A EP 21190239A EP 4098392 A1 EP4098392 A1 EP 4098392A1
Authority
EP
European Patent Office
Prior art keywords
welding
cover plate
power
low
starts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21190239.0A
Other languages
German (de)
English (en)
Inventor
Yanliang FAN
Tianxing ZENG
Ruxin Song
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CALB Technology Co Ltd
CALB Co Ltd
Original Assignee
CALB Technology Co Ltd
CALB Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CALB Technology Co Ltd, CALB Co Ltd filed Critical CALB Technology Co Ltd
Publication of EP4098392A1 publication Critical patent/EP4098392A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/26—Seam welding of rectilinear seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • B23K26/703—Cooling arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0053—Seam welding
    • B23K15/006—Seam welding of rectilinear seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0626—Energy control of the laser beam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the disclosure relates to a technical field of battery production and manufacturing, and in particular, relates to a welding method of a battery cover plate.
  • indentations on the battery shell may lead to the following problems. Indentations on the shell may lead to a decrease in the internal space of the battery, the injection time is prolonged, and the injected electrolyte may produce spray. After the battery is provided with a constant capacity, the electrode sheet may swell and cause the cell to swell. Since the positions of the indentations on the shell may abut against the surface of the cell, lithium precipitation may occur. The indentations on the shell may also increase the difficulty of sorting and attaching of blue films, and bubbles and folds may be easily generated as a result. Further, the battery module needs to be coated with more structural glue to fill the indentations, the efficiency of module formation may simultaneously be affected, and the appearance and quality may also be influenced.
  • the disclosure provides a welding method of a battery cover plate.
  • a welding method of a battery cover plate includes the following steps. First welding is performed. The first welding starts from an edge of one side of the cover plate, continuously welds a portion of a connecting seam between a shell and the cover plate, and ends at an edge of an opposite side of the cover plate. Second welding is performed. The second welding starts from an ending position of the first welding, continuously welds a remaining portion of the connecting seam, and ends at an initial position of the first welding, or, the second welding starts from the initial position of the first welding, continuously welds the remaining portion of the connecting seam, and ends at the ending position of the first welding.
  • connection In particular, a reference to “the” object or “a” and “an” object is intended to denote also one of a possible plurality of such objects.
  • the terms “connect”, “fix” should be broadly interpreted, for example, the term “connect” can be “fixedly connect”, “detachably connect”, “integrally connect”, “electrically connect” or “signal connect”.
  • the term “connect” also can be “directly connect” or “indirectly connect via a medium”.
  • FIG. 1 illustrates a schematic view of a weld track in a welding method of a battery cover plate provided by the disclosure.
  • the welding method of the battery cover plate provided by the disclosure is described by treating the welding of a shell 200 and a cover plate 100 applied to a vehicle battery as an example.
  • a person having ordinary skill in the art should easily understand that, in order to apply the relevant design of the disclosure to welding processes of cover plates 100 of other types of batteries, various modifications, additions, substitutions, deletions, or other changes may be made to the following specific embodiments, and these changes still fall within the scope of the principle of the welding method of the battery cover plate provided by the disclosure.
  • the welding method of the battery cover plate includes performing two times of welding along a connecting seam between the shell 200 and the cover plate 100.
  • a weld track of each welding is a portion of the connecting seam, and the overall weld track of the two times of welding covers a periphery of the connecting seam.
  • first welding is performed, and the first welding starts from an edge of one side of the cover plate 100, continuously welds a portion of the connecting seam between the shell 200 and the cover plate 100, and ends at an edge of an opposite side of the cover plate 100.
  • Second welding is performed, and the second welding starts from an ending position of the first welding, continuously welds a remaining portion of the connecting seam, and ends at an initial position of the first welding, or, the second welding starts from the initial position of the first welding, continuously welds the remaining portion of the connecting seam, and ends at the ending position of the first welding.
  • the welding method of the battery cover plate provided by the disclosure may facilitate heat dissipation of the battery shell. As overall heat produced in a welding process is low, deformation may not easily occur, and the problem of indentations may also be alleviated. A decrease in indentations may reach as much as 40% to 50%, and a product yield of the welding process may thus be significantly improved.
  • the welding method of the battery cover plate including two times of welding is taken as an example in this embodiment.
  • the welding method may include the following steps. Performing the first welding, wherein the first welding starts from the edge of one side of the cover plate 100, continuously welds a portion of the connecting seam, and ends at the edge of the opposite side of the cover plate. Performing the second welding, wherein the second welding starts from the ending position of the first welding, continuously welds the remaining portion of the connecting seam, and ends at the initial position of the first welding.
  • a substantially U-shaped weld track may be formed through one time of welding, and welding of half of the battery is completed at a time, so high welding efficiency is provided.
  • the welding method including two times of welding is taken as an example herein, and the two times of welding may respectively start from a middle portion of the edge of the battery cover plate to facilitate heat dissipation and to further prevent indentations from occurring.
  • an ending position B2 of the second welding may substantially overlap an initial position A1 of the first welding
  • an initial position B1 of the second welding may substantially overlap an ending position A2 of the first welding.
  • a pause is provided after the first welding ends and before the second welding starts. Accordingly, in the disclosure, before the other half of the battery is welded, heat dissipation may be performed during the pause, and deformation of the shell may thus be further reduced.
  • a track of the connecting seam between the shell 200 and the cover plate 100 is substantially rectangular, and the rectangular track has two opposite longer sides.
  • the two longer sides correspond to larger surfaces of the two sides of the shell 200.
  • the initial position of each welding corresponds to one of the longer sides
  • the ending position of each welding corresponds to the other one of the longer sides.
  • the welding may start from one of the longer sides of the rectangular track of the connecting seam and ends at the other one of the longer sides. That is, each welding starts from a position of the connecting seam corresponding to the larger surface of one side of the shell 200 and ends at a position of the connecting seam corresponding to the larger surface of the other side of the shell 200.
  • the rectangular track of the connecting seam has two longer sides opposite to each other, so that the initial position of each welding may correspond to a midpoint position of one of the longer sides, and the ending position of each welding may correspond to a midpoint position of the other one of the longer sides.
  • a welding beam may move along approximately half the periphery of the track of the connecting seam between the cover plate 100 and the shell 200, and may move from one larger surface of one side to the larger surface of the other side.
  • the welding method of the battery cover plate provided by the disclosure may further include the following steps. After the first welding ends, releasing positioning performed by the fixture, positioning the battery to the fixture again after horizontally rotating the battery by 180°, and then performing the second welding. A position of a welding device is substantially stationary in the process.
  • the shells on both sides of the battery may be made symmetrical, and a welding head of the welding device does not need to be moved to a great extent.
  • the initial position of the first welding is cooled down for a certain period of time, such that stopping time for cooling may be shortened, and the shell may be further reduced, especially the indentations on the larger surfaces of the shell.
  • the foregoing welding method may be conveniently performed.
  • the welding device may be moved to the initial position of the second welding, and the second welding is then performed, which is not limited to the embodiment.
  • the pause may be greater than or equal to the time required for "releasing positioning performed by the fixture ⁇ horizontally rotating the battery by 180 ° ⁇ performing positioning again by the fixture". That is, the operation of battery rotation by 180° may be performed during the pause. In other words, the operation of rotating the battery by 180° is equivalent to providing the pause between the two times of welding.
  • the welding beam (e.g., a laser source) may be aligned with a position A on the edge of the cover plate 100, and a gap G1 is defined between the position A and the connecting seam.
  • the gap G1 may be less than 0.5mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, etc. Since higher-power of welding is required to satisfy the strength required for formation of the weld seam, the cover plate 100 having larger thickness may not be easily welded through, or the cover plate 100 may withstand greater welding power than the shell 200.
  • the weld track is arranged on the position A of the cover plate 100, wherein the gap G1 is defined between the position A and the connecting seam, and in this way, the battery is prevented from being welded through and damaged. Safety of the welding is thereby improved, and a welding yield of the battery is effectively increased.
  • the gap G1 may also be less than 0.1mm or may be greater than or equal to 0.5mm, such as 0.08mm, 0.6mm, etc., which is not limited to the disclosure.
  • FIG. 3 illustrates a schematic view of a weld track in embodiment two in a welding method of a battery cover plate provided by the disclosure.
  • FIG. 3 illustrates a schematic view of a weld track in embodiment two in a welding method of a battery cover plate provided by the disclosure.
  • the welding beam may move from a position of the cover plate 100 adjacent to the edge towards the edge of the cover plate 100 to achieve a laser molten metal pool, and may continuously move along the connecting seam after reaching the edge of the cover plate 100.
  • the laser molten metal pool before the initial position A1 of the first welding and the ending position A2 of the continuous welding are shown, and the laser molten metal pool before the initial position B1 of the second welding and the ending position B2 of the continuous welding are also shown.
  • a moving distance G2 of the welding beam from the position of the cover plate 100 adjacent to the edge towards the edge of the cover plate 100 is greater than the gap G1 between the alignment position of the welding beam on the cover plate 100 and the connecting seam when continuous welding is performed.
  • a moving distance G3 of the welding beam from the position of the cover plate 100 adjacent to the edge towards the edge of the cover plate 100 is greater than the gap G1 between the alignment position of the welding beam on the cover plate 100 and the connecting seam when continuous welding is performed.
  • the molten metal pool is similar to water flow and moves forwards along a welding path.
  • an approximately "L"-shaped molten metal pool adjacent to the initial position may be formed when the welding starts. In this way, light leakage may be effectively reduced, the safety of the battery may be improved, and a process yield may be further increased.
  • a maximum gap of light leakage may be increased from 0.1mm provided by the related art to 0.2mm.
  • the moving distance G2 may be less than 0.8mm, such as 0.5mm, 0.6mm, 0.7mm, etc. In other embodiments, the moving distance G2 may also be less than 0.5mm or may be greater than or equal to 0.8mm, such as 0.45mm, 0.9mm, etc., which is not limited to the embodiment. Besides, based on the design in which the gap G1 is less than 0.5mm in embodiment one, the moving distance G2 is at least greater than or equal to 0.5mm.
  • the moving distance G3 may be less than 0.8mm, such as 0.5mm, 0.6mm, 0.7mm, etc. In other embodiments, the moving distance G3 may also be less than 0.5mm or may be greater than or equal to 0.8mm, such as 0.45mm, 0.9mm, etc., which is not limited to the embodiment. Besides, based on the design in which the gap G1 is less than 0.5mm in embodiment one, the moving distance G3 is at least greater than or equal to 0.5mm. Besides, before the two times of welding start, the moving distances G2 and G3 of the welding beam from the position on the cover plate 100 adjacent to the edge towards the edge of the cover plate 100 may be but not limited to equal.
  • welding power accelerates to rated power when the welding beam starts to move from the initial position.
  • a portion of the connecting seam corresponding to movement of the welding beam when the welding power accelerates forms a low-power welding zone.
  • the connecting seam forms a low-power welding zone L1 corresponding to an acceleration process of the welding power of the first welding
  • the connecting seam forms a low-power welding zone L2 corresponding to an acceleration process of the welding power of the second welding.
  • the welding beam decelerates from the rated power before moving towards the ending position, and the portion of the connecting seam corresponding to movement of the welding beam when the welding power decelerates forms the low-power welding zone.
  • the low-power welding zone formed when the initial welding power accelerates during the second welding may overlap the low-power welding zone formed when the welding power decelerates before the first welding ends.
  • the low-power welding zone formed when the welding power decelerates before ending during the second welding overlaps the low-power welding zone formed when the initial welding power accelerates during the first welding.
  • a length of the low-power welding zone formed when the initial welding power accelerates may be equal to a length of the low-power welding zone formed when the welding power decelerates before ending.
  • weld strength of the low-power welding zones may be improved.
  • the low-power welding zone formed when the welding power decelerates during the first welding actually overlaps the low-power welding zone L2
  • the low-power welding zone formed when the welding power decelerates during the second welding actually overlaps the low-power welding zone L1.
  • the second welding may start from a position before the ending position of the first welding.
  • the low-power welding zone formed when the welding power accelerates during the second welding overlaps a portion of the weld track of the first welding adjacent to the ending position, and a portion of the weld track of the second welding adjacent to the ending position overlaps the low-power welding zone of the first welding.
  • the low-power welding zone formed when the second welding starts overlaps the low-power welding zone formed when the first welding starts.
  • each welding may start from a position before the ending position of the previous welding. In this way, a portion of the weld track adjacent to the initial position overlaps the low-power welding zone formed when the welding power decelerates during the previous welding, and the low-power welding zone of the last welding overlaps a portion of the weld track of the first welding adjacent to the initial position.
  • the low-power welding zone formed when the second welding ends overlaps the low-power welding zone formed when the first welding ends.
  • the low-power welding zone is a zone where the laser may pass through during both times of welding, and laser irradiation power received by this zone is smaller, so that the stiffness of the weld seam may be ensured through overlapping of the irradiation.
  • the shell of the battery is required to be sealed, if he two times of welding in the low-power welding zone are hit at the same position with the rated power (higher power), it is easy to cause battery breakdown. Therefore, the foregoing process design provided by the disclosure ensures both the stiffness of the weld seam and the sealing property of the battery.
  • the length of the low-power welding zone L1 formed when the welding power accelerates after the first welding starts may be 3mm to 6mm, such as 3mm, 4mm, 5mm, 6mm, etc. In other embodiments, the length of the low-power welding zone L1 may also be less than 3mm or may be greater than 6mm, such as 2mm, 7mm, etc., which is not limited to the embodiment.
  • the length of the low-power welding zone L2 formed when the welding power accelerates after the second welding starts may be 3mm to 6mm, such as 3mm, 4mm, 5mm, 6mm, etc. In other embodiments, the length of the low-power welding zone L2 may also be less than 3mm or may be greater than 6mm, such as 2mm, 7mm, etc., which is not limited to the embodiment.
  • the length of the low-power welding zone formed when the welding power decelerates before the first welding ends and the length of the low-power welding zone formed when the welding power decelerates before the second welding ends may be found with reference to length ranges of the low-power welding zone L2 and the low-power welding zone L1 respectively, description thereof is thus not repeated herein.
  • FIG. 4 illustrates a schematic view of a weld track in embodiment three in a welding method of a battery cover plate provided by the disclosure.
  • FIG. 4 illustrates a schematic view of a weld track in embodiment three in a welding method of a battery cover plate provided by the disclosure.
  • the welding method of the battery cover plate including two times of welding is taken as an example in this embodiment.
  • the welding method may include the following steps. Performing the first welding, wherein the first welding starts from the edge of one side of the cover plate 100, continuously welds a portion of the connecting seam, and ends at the edge of the opposite side of the cover plate 100. Performing the second welding, wherein the second welding starts from the initial position (or an adjacent region) of the first welding, continuously welds the remaining portion of the connecting seam, and ends at the ending position (or an adjacent region) of the first welding.
  • the initial position B1 of the second welding may substantially be adjacent to the initial position A1 of the first welding
  • the ending position B2 of the second welding may substantially be adjacent to the ending position A2 of the first welding.
  • the welding method of the battery cover plate provided by the disclosure, welding of the connecting seam between the battery shell and the cover plate is divided into two times of welding. During each welding, welding is performed from one side of the connecting seam towards the opposite side, and welding of the entire periphery of the connecting seam is ultimately achieved.
  • the welding method of the battery cover plate provided by the disclosure may facilitate heat dissipation of the battery shell. As overall heat produced in the welding process is low, deformation may not easily occur, the problem of indentations may be alleviated, and the product yield of the welding process may also be significantly improved.
  • Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein.
  • the disclosure is intended to cover any variations, uses or adaptations of the disclosure. These variations, uses, or adaptations follow the general principles of the disclosure and include common general knowledge or conventional technical means in the art that are not disclosed in the present disclosure.
  • the specification and embodiments are illustrative.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
EP21190239.0A 2021-06-04 2021-08-09 Procédé de soudage de plaque de couvercle de batterie Pending EP4098392A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110623708.2A CN113346167B (zh) 2021-06-04 2021-06-04 电池盖板的焊接方法

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EP4098392A1 true EP4098392A1 (fr) 2022-12-07

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EP (1) EP4098392A1 (fr)
CN (1) CN113346167B (fr)

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CN113794028B (zh) * 2021-09-30 2024-03-19 兰钧新能源科技有限公司 锂电池和锂电池防爆阀焊接工艺
CN113725529B (zh) * 2021-11-01 2022-03-04 中航锂电科技有限公司 一种电池及焊接方法
CN114122587A (zh) * 2021-12-17 2022-03-01 珠海冠宇电池股份有限公司 一种电池
CN118056320A (zh) * 2022-09-16 2024-05-17 宁德时代新能源科技股份有限公司 焊接方法、电池单体、电池和用电设备
CN117359101B (zh) * 2023-12-08 2024-08-02 深圳市森宝智能装备有限公司 一种电池盖板自动焊接设备
CN117691269B (zh) * 2024-01-31 2024-04-16 蜂巢能源科技股份有限公司 一种电芯

Citations (3)

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